(DME) Condition For Fault ID - Checksum Error

CDBD - U1138

Information saved in
DME

Fault code
CDBD - U1138

Fault text
Idle actuator CAN message, bank 1

Fault description
Message Monitoring Idle-Speed Control Valve DPR
Overwrite Error (Bank 1)

Condition for fault identification
Test condition:
Checksum error > 5 (K_CAN_CHKSUM_ERR_MAX)
Terminal condition: TERM87
Voltage condition:
Battery voltage > 6.8V (k_egas_can_ed_ub_min)

Condition for fault memory entry
50 ms

Action in service
1. Clear fault memory, LLS idle actuator system test,
2. Program DME,
3. Replace DME

Fault effect and breakdown warning
DSC lamp / CC message / engine speed limited to 5000 rpm
/ reduced power / engine start may be possible only with use
of accelerator pedal

Driver information
Warning light:
MIL, EML, CC message, backup program

Service instruction
none